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Cadillac 472ci swap?

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Cadillac 472ci swap?

Postby Redcap on Tue Dec 19, 2006 7:15 pm

I may be buying a running 472" Caddy motor this weekend and I'm wondering how easy it would be to stick that in my Cutlass?

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Postby clean8485 on Tue Dec 19, 2006 8:56 pm

I believe that there are 1 or 2 companies that have parts to swap the Caddy engine into a G body. There was an article in Hot Rod (I think), a few years ago, about a Caddy swap in an El Camino. Since the Caddy motors are famous for torque, it makes it hard to keep tires on the car. Good luck with the swap, and let us know how it goes.

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Postby jerrycad472 on Tue Dec 19, 2006 10:04 pm

I believe the G-Body Swap is fairly common.

Maximum Torque Specialties out of Devan, Wisconsin, sells a lot of performance parts for the 472/500 Motors. They sell some universal motor mount kits. They may sell headers that are ready to go for the G-Body swap. There are at least a couple of other places selling parts out there, but I have dealt with MTS and the customer service is good, you deal with the owner directly.

You will need a rear sump oil pan from a Eldorado. The Devilles used a center sump oil pan which won't clear your cross member.

The 472/500 require a transmisson with the Buick, Olds, Pontiac Bolt Pattern.

I would recommend that unless you are running a overdrive trans that you stay will a rear end ratio in the 3:00 - 3:30 range. These motors don't rev very high. I have a 3:73 in my 472 Camaro and its too much on the highway.

I have had my 472 '70 Camaro for 15 years. I have a 70 472 with 10.5:1 Compression, ported factory heads, factor Single Plane Manifold, Holley 800, factory manifolds, and an MTS Mid Grind Cam.

If you can get headers and an aftermarket intake it should really open it up.

Good luck.
81 Monte Carlo - LS1 6-spd (conversion in process)
70 Camaro 472 Cadillac Power
07 Silverado Z71 Crew Cab

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Postby Chevyman85 on Tue Dec 19, 2006 10:11 pm

That should be a good project. I'd make sure and get the tranmission along w/ the 472. You should run a solid TH-400 behind the BBC. Those things have tons of torque. The hardest part will be fitting in the headers.
Daily Driver: '98 Chevy Silverado 1500 Z71 V8 5.7L 3.73:1 Posi 14-Bolt GM
Project Car: '85 Chevy El Camino V8 355 4-Bolt Main 10:1/TH-350 Trans Non-Lockup 2500 Stall, Eaton Posi w/3.73:1 Richmond Gears, Flex-A-Lite Electronic Fan, GM Serp. Conversion

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Postby Redcap on Sun Dec 24, 2006 3:29 pm

Well, it looks like this project is a no-go. Went by the old guy's place with cash in hand today, but he jumped the price from $150 to $350 as soon as I started talking to him, after we had already agreed on $150 for the complete motor. :x

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